<template>
<div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/welcome' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>商品管理</el-breadcrumb-item>
        <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
        <!-- 提示信息 -->
        <el-alert title="添加商品信息" type="info" center show-icon :closable="false"></el-alert>
        <!-- 步骤条区域 -->
        <el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center>
            <el-step title="基本信息"></el-step>
            <el-step title="商品参数"></el-step>
            <el-step title="商品属性"></el-step>
            <el-step title="商品图片"></el-step>
            <el-step title="商品内容"></el-step>
            <el-step title="完成"></el-step>
        </el-steps>
        <!-- tab栏区域 -->
        <el-form :model="addForm" ref="addFormRef" :rules="addFormRules" label-width="80px" label-position="top">
            <el-tabs tab-position="left" v-model="activeIndex" :before-leave="beforeLeave" @tab-click="tabClick">
                <el-tab-pane label="基本信息" name="0">
                    <el-form-item label="商品名称" prop="goods_name">
                        <el-input v-model="addForm.goods_name"></el-input>
                    </el-form-item>
                    <el-form-item label="商品价格" prop="goods_price">
                        <el-input v-model="addForm.goods_price" type="number"></el-input>
                    </el-form-item>
                    <el-form-item label="商品数量" prop="goods_number">
                        <el-input v-model="addForm.goods_number" type="number"></el-input>
                    </el-form-item>
                    <el-form-item label="商品重量" prop="goods_weight">
                        <el-input v-model="addForm.goods_weight" type="number"></el-input>
                    </el-form-item>
                    <el-form-item label="商品分类" prop="goods_cat">
                        <el-cascader v-model="addForm.goods_cat" :options="cateList" :props="cateProps" @change="handleChange"></el-cascader>
                    </el-form-item>
                </el-tab-pane>
                <el-tab-pane label="商品参数" name="1">
                    <el-form-item :label="item.attr_name" v-for="item in manyParamsDate" :key="item.attr_id">
                        <el-checkbox-group v-model="item.attr_vals">
                            <el-checkbox border :label="item1" v-for="(item1, i) in item.attr_vals" :key="i"></el-checkbox>
                        </el-checkbox-group>
                    </el-form-item>

                </el-tab-pane>
                <el-tab-pane label="商品属性" name="2">
                    <el-form-item :label="item.attr_name" v-for="item in onlyParamsDate" :key="item.attr_id">
                        <el-input v-model="item.attr_vals"></el-input>
                    </el-form-item>
                </el-tab-pane>
                <el-tab-pane label="商品图片" name="3">
                    <el-upload :action="uploadUrl" :on-preview="handlePreview" :on-remove="handleRemove" list-type="picture" :headers="uploadHeaders" :on-success="uploadSuccess">
                        <el-button size="small" type="primary">点击上传</el-button>
                    </el-upload>
                </el-tab-pane>
                <el-tab-pane label="商品内容" name="4">
                    <!-- 富文本编辑器 -->
                    <quill-editor v-model="addForm.goods_introduce"></quill-editor>
                    <el-button type="primary" class="addbtn" @click="addGood">添加商品</el-button>

                </el-tab-pane>
            </el-tabs>
        </el-form>
    </el-card>
    <!-- 图片预览 -->
    <el-dialog title="图片预览" :visible.sync="previewVisible" width="50%">
        <img :src="previewPath" class="previewImg">
    </el-dialog>

</div>
</template>

<script>
import _ from 'lodash'
export default {
  data() {
    return {
      activeIndex: '0',
      // 添加表单的数据
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_number: 0,
        goods_weight: 0,
        // 分类列表
        goods_cat: [],
        attrs: [],
        // 上传的图片临时路径
        pics: [],
        goods_introduce: ''
      },
      // 添加表单的验证规则
      addFormRules: {
        goods_name: [{
          required: true,
          message: '请输入商品名称',
          trigger: 'blur'
        }],
        goods_price: [{
          required: true,
          message: '请输入商品名称',
          trigger: 'blur'
        }],
        goods_number: [{
          required: true,
          message: '请输入商品名称',
          trigger: 'blur'
        }],
        goods_weight: [{
          required: true,
          message: '请输入商品名称',
          trigger: 'blur'
        }],
        goods_cat: [{
          required: true,
          message: '请输入商品分类',
          trigger: 'blur'
        }]
      },
      // 商品分类列表
      cateList: [],
      // 商品分类级联选择器配置项
      cateProps: {
        expandTrigger: 'hover',
        label: 'cat_name',
        value: 'cat_id',
        children: 'children'
      },
      // 动态参数数据
      manyParamsDate: [],
      // 静态属性数据
      onlyParamsDate: [],
      // 文件上传地址
      uploadUrl: 'https://www.liulongbin.top:8888/api/private/v1/upload',
      // 配置文件上传头信息
      uploadHeaders: {
        Authorization: sessionStorage.getItem('token')
      },
      // 图片预览路径
      previewPath: '',
      // 图片预览是否显示
      previewVisible: false
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    // 获取商品分类列表
    async getCateList() {
      const {
        data: res
      } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类列表失败！')
      }
      this.cateList = res.data
      // console.log(this.cateList);
    },
    // 监听商品分类级联选择器选中项更改
    handleChange() {
      // console.log(this.addForm.goods_cat);
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
    },
    // 切换tab标签之前触发
    beforeLeave(activeName, oldActiveName) {
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请先选择商品分类！')
        return false
      }
    },
    // 点击tab标签时触发
    async tabClick() {
      if (this.activeIndex === '1') {
        const {
          data: res
        } = await this.$http.get(`categories/${this.cateId}/attributes`, {
          params: {
            sel: 'many'
          }
        })
        if (res.meta.status !== 200) {
          return this.$message.error('获取商品动态参数失败！')
        }

        res.data.forEach(item => {
          item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        this.manyParamsDate = res.data

        // console.log(this.manyParamsDate);
      } else if (this.activeIndex === '2') {
        const {
          data: res
        } = await this.$http.get(`categories/${this.cateId}/attributes`, {
          params: {
            sel: 'only'
          }
        })
        if (res.meta.status !== 200) {
          return this.$message.error('获取商品动态参数失败！')
        }

        this.onlyParamsDate = res.data
      }
    },
    // 监听文件上传的图片预览
    handlePreview(file) {
      // console.log(file);
      this.previewPath = file.response.data.url
      this.previewVisible = true
    },
    // 监听移除上传图片的事件
    handleRemove(file) {
      var filepath = file.response.data.tmp_path
      const i = this.addForm.pics.findIndex(item => item.pic === filepath)
      this.addForm.pics.splice(i, 1)
      // console.log(this.addForm);
    },
    // 图片上传成功
    uploadSuccess(res) {
      const obj = {
        pic: res.data.tmp_path
      }
      this.addForm.pics.push(obj)
      // console.log(this.addForm);
    },
    // 添加商品
    addGood() {
      // console.log(this.addForm);
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) {
          return this.$message({
            message: '请填写必要的表单项！',
            type: 'error'
          })
        }
        this.manyParamsDate.forEach(item => {
          const newInfo = {
            'attr_id': item.attr_id,
            'attr_value': item.attr_vals.join(' ')
          }
          this.addForm.attrs.push(newInfo)
        })
        this.onlyParamsDate.forEach(item => {
          const newInfo = {
            'attr_id': item.attr_id,
            'attr_value': item.attr_vals
          }
          this.addForm.attrs.push(newInfo)
        })
        var form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')
        // console.log(form);
        const {
          data: res
        } = await this.$http.post('goods', form)
        if (res.meta.status !== 201) {
          return this.$message({
            message: '添加商品失败！',
            type: 'error'
          })
        }
        this.$message({
          message: '添加商品成功！',
          type: 'success'
        })
        this.$router.push('/goods')
      })
    }
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }
  }
}
</script>

<style lang="less" scoped>
.el-checkbox {
    margin: 0 10px 5px 0 !important;
}

.previewImg {
    width: 100%;
}

.addbtn {
    margin-top: 15px;
}
</style>
